CAJ | 학술논문

将小波包变换应用于S700K型提速道岔转辙机故障诊断中，以微机监测系统采集的S700K型转辙机三相交流电流为信号源，基于小波包多尺度分析对道岔转辙机正常工作状态和各故障状态下的三相交流电流进行分解，并通过小波包能量熵提取故障特征，然后根据能量熵定义故障诊断指标，并对每相电流的故障诊断指标设定2个阈值，来定量划分故障类型。实验结果表明：道岔不同故障情况下，三相电流小波包能量熵分布有一定的规律，故障诊断指标阈值的设定能有效划分道岔故障类型，待测样本测试结果与现场诊断结果一致。
장소파포변환응용우S700K형제속도차전철궤고장진단중，이미궤감측계통채집적S700K형전철궤삼상교류전류위신호원，기우소파포다척도분석대도차전철궤정상공작상태화각고장상태하적삼상교류전류진행분해，병통과소파포능량적제취고장특정，연후근거능량적정의고장진단지표，병대매상전류적고장진단지표설정2개역치，래정량화분고장류형。실험결과표명：도차불동고장정황하，삼상전류소파포능량적분포유일정적규률，고장진단지표역치적설정능유효화분도차고장류형，대측양본측시결과여현장진단결과일치。
The wavelet packet transformation was applied to the fault diagnosis of S700K type speed-up turnout switch machine.The three-phase AC current of S700K switch collected from microcomputer monitoring system was given as signal source.Based on wavelet packet multi-scale analysis,the three-phase alternating current of switch machine in working state and fault state was decomposed,and the fault feature from the wavelet energy entropy was extracted.Then according to the definition of the fault diagnosis index,two thresholds for each phase of the alternating current fault diagnosis index were set to categorize the fault type quantitatively.The experimen-tal results show that wavelet energy entropy distribution of three-phase current has certain rules,and the thresh-olds of fault diagnosis index can effectively partition switch fault types.Moreover,the sample test results are con-sistent with the actual field diagnostic results.